package net.lzzy.practices.courses;

import net.lzzy.practices.constants.ApiConstant;
import net.lzzy.practices.constants.Messgaes;
import net.lzzy.practices.entities.Course;
import net.lzzy.practices.entities.User;
import net.lzzy.practices.services.CourseService;
import net.lzzy.practices.services.UserService;
import net.lzzy.practices.web.models.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.*;
import net.lzzy.practices.utils.StrungUtil.*;

import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.UUID;

@RestController
@CrossOrigin
@RequestMapping(ApiConstant.ROUTE_COURSE_ROOT)
public class CourseApiController {
    private final CourseService service;
    private final UserService uService;
    @Autowired
    public CourseApiController(CourseService service, UserService uService) {
        this.service = service;
        this.uService = uService;
    }
    @GetMapping(ApiConstant.ROUTE_COURSE_ALL)
    public ApiResult getCourses(@RequestParam String token){
        List<VmCourse> courses = new ArrayList<>();
        service.get(true).forEach(course -> courses.add(VmCourse.create(course,false)));
        return new ApiResult(true,courses.size()+"",courses);
    }
    @GetMapping(ApiConstant.ROUTE_COURSE_OPEN)
    public ApiResult getOpenCourses(@RequestParam String token){
        List<VmCourse> courses = new ArrayList<>();
        service.get(true).forEach(course -> courses.add(VmCourse.create(course,false)));
        return new ApiResult(true,courses.size()+"",courses);
    }
    @GetMapping(ApiConstant.ROUTE_COURSE_PAGE)
    public ApiResult getPagedCourses(@RequestParam String token,@RequestParam int page,@RequestParam int size){
        List<VmCourse> courses = new ArrayList<>();
        service.get(page, size).forEach(course -> courses.add(VmCourse.create(course,false)));
        return new ApiResult(true,courses.size()+"",courses);
    }
    @GetMapping(ApiConstant.ROUTE_COURSE_OPEN_PAGE)
    public ApiResult getPagedOpenCourses(@RequestParam String token,@RequestParam int page,@RequestParam int size){
        List<VmCourse> courses = new ArrayList<>();
        service.get(page, size,true).forEach(course -> courses.add(VmCourse.create(course,false)));
        return new ApiResult(true,courses.size()+"",courses);
    }

    @GetMapping(ApiConstant.ROUTE_COURSE_TEACHER)
    public ApiResult getTeacherCourses(@RequestParam String token, @RequestParam(name = "id")UUID teacherId){
        List<VmCourse> courses = new ArrayList<>();
        service.getteachersCourses(teacherId).forEach(course -> courses.add(VmCourse.create(course,false)));
        return new ApiResult(true,courses.size()+"",courses);

    }
    @GetMapping(ApiConstant.ROUTE_COURSE_STUDENT)
    public ApiResult getStudentCourses(@RequestParam String token, @RequestParam(name = "id")UUID studentId){
        List<VmCourse> courses = new ArrayList<>();
        service.getStudentCourses(studentId).forEach(course -> courses.add(VmCourse.create(course,false)));
        return new ApiResult(true,courses.size()+"",courses);
    }
    private ApiResult addOrUpdate(UUID id, CourseInfo info){
        String token=info.getToken();
        String name=info.getName();
        String desc=info.getDesc();
        String cover=info.getCover();
        String teacherId=info.getTid();
        boolean open=info.isOpen();
        if(StringUtil.isEmpty(name)||
                StringUtil.isEmpty(desc)||
                StringUtil.isEmpty(cover)||
                StringUtil.isEmpty(teacherId)){
            return new ApiResult(false, Messgaes.MISS_ARGS.toString(), null);
        }
        User teacher=uService.getById(UUID.fromString(teacherId));
        if(teacher==null){
            return new ApiResult(false,Messgaes.WRONG_ID.toString(),null);
        }
        Course course;
        boolean add=id==null;
        if(add){
            course=new Course();
            course.setTeacher(teacher);
        }else {
            course=service.getById(id);
            if(course==null){
                return new ApiResult(false,Messgaes.WRONG_ID.toString(), null);
            }
        }
        course.setUpdateTime(new Date());
        course.setOpen(open);
        course.setCover(cover);
        course.setDescription(desc);
        if(add){
            return new ApiResult(true,Messgaes.SUCCESS.toString(), VmCourse.create(service.add(course),true));
        }else {
            Course updated=service.update(course,token);
            if(updated==null){
                return new ApiResult(false,Messgaes.NO_PERMISSION.toString(), null);
            }
            return new ApiResult(true,Messgaes.SUCCESS.toString(), VmCourse.create(updated,true));
        }
    }
    @PostMapping(ApiConstant.ROUTE_COURSE_ALL)
    public ApiResult add(@RequestBody CourseInfo info){
        return addOrUpdate(null,info);
    }

    @PutMapping(ApiConstant.ROUTE_COURSE_PUT)
    public ApiResult update(@PathVariable UUID id,@RequestBody CourseInfo info){
        return addOrUpdate(id,info);
    }
    @PostMapping(ApiConstant.ROUTE_COURSE_OPEN_CLOSE)
    public ApiResult openClose(@RequestBody CourseOpenInfo info){
        String token=info.getToken();
        String strCourseId=info.getCid();
        boolean open=info.isOpen();
        if(StringUtils.isEmpty(token)||StringUtils.isEmpty(strCourseId)){
            return new ApiResult(false,Messgaes.MISS_ARGS.toString(), null);
        }
        Course course=service.openCloseCourse(UUID.fromString(strCourseId),open,token);
        if (course==null){
            return new ApiResult(false,Messgaes.NO_PERMISSION.toString(), null);
        }
        return new ApiResult(true,Messgaes.SUCCESS.toString(), VmCourse.create(course,true));
    }
    @DeleteMapping(ApiConstant.ROUTE_COURSE_REMOVE)
    public ApiResult delete(@RequestBody CourseKeyInfo info){
        String token=info.getToken();
        String strCourseId=info.getCid();
        if(StringUtils.isEmpty(token)||StringUtils.isEmpty(strCourseId)){
            return new ApiResult(false,Messgaes.MISS_ARGS.toString(), null);
        }
        try {
            UUID courseId=UUID.fromString(strCourseId);
            Messgaes msg=service.remove(courseId,token);
            return new ApiResult(msg==Messgaes.SUCCESS,msg.toString(),null);
        }catch (Exception e){
            return new ApiResult(false,Messgaes.WRONG_ID.toString(), null);
        }

    }
}
